Hi, I am new to Rails, and I am trying to create checkboxes in a view. I came across this method:
What I am trying to understand here is, where does this “:author_ids” method come from? Is this similar to author.ids method? I have been reading through the guide but struggling to find out where is the method coming from? Also I do not quite understand the purpose of parsing this “:name_with_initial” into the method.
Appreciate for any advice/explanation on this.
That would come from a
has_may :authors association. ActiveRecord knows how to handle those associations through those methods.
It's documented here as
As I understand it,
author_ids is one of those Rails built-in magic merhods that gives you all the IDs of associated records. For example, if I have a School that
has_many :teachers I can do
School.find(1).teacher_ids to get all the IDs of all the teachers associated with that school. Super handy and saves writing some gnarly SQL.
name_with_initial method is generating the text shown alongside the checkbox. It could just be a plain text column from Author, like
first_name but this is showing you how you can spruce it up a bit and use a method to generate fotmatted text instead.
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